I have a book and had to change mine and basically it snaps out and you have to feed the wire down the steering column and put it in place and snap the other one in.I would advise buying a book because each year has different settings for the switch,for example, mine must be in drive 2 with the right blinker on to work correctly.
If the dimmer control is built into the turn signal lever rather than on the floor, then the switch will be inside the left side of the steering colume.
Replace the lever with a new or good used one.
nevermind
lever pulled out, having trouble getting the lever locked back in place
how to replace high/low beam, turn signal lever on 1996 subaru outback wagon
That would be best if left to a certified technician because of the wiring involved.
dimmer switch is on the turn signal lever, to replace you need to remove steering wheel
It turns out the headlight switch is not a serviceable part on the Subaru Forester. Instead, the entire turn signal lever must be replaced (a $100 part). A brief description of how to replace the turn signal lever follows: First, remove the steering column cover. There are three screws underneath - remove those. Then release the steering column adjustment lever and leave it down. The bottom part of the steering column cover unsnaps from the top part and you should be able to remove it easily. The top part of the steering column cover can just stay there and be moved as necessary to gain access to screws. Next, remove two screws where the turn signal lever assembly attaches to the steering column. Remove the electrical harness and the turn signal lever assembly should just pull straight out. Reverse the process to put in the new turn signal lever assembly.
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I would replace the turn signal switch.
The problem is caused by the headlight switch in the turn signal lever. The headlight switch loosens over time and causes electrical shorts which make the headlight go out when the switch is jiggled. This happens most commonly when indicating in either direction. The fix is to replace the turn signal lever. The lever is approximately $100 and can be easily replaced at home. Unscrew 3 screws on the bottom of the steering wheel column cover. Push the steering wheel height adjustment lever all the way down to remove the cover. The turn signal lever can then be removed by removing the electrical harness and unscrewing the two screws that secure it to the steering column. Reverse the process to put in the new turn signal lever.